"We are not demand constrained. We are potentially production constrained," insists Elon Musk...

"We are not demand constrained. We are potentially production constrained," insists Elon Musk during Tesla's (TSLA) Q4 call. Comments in the shareholder letter (.pdf) about a slower pace of Model S reservations in January and an elevated rate of cancellations, in response to Tesla's price hike, have some investors on edge. Tesla is counting on labor productivity gains - less overtime is mentioned - to hit its gross margin target. 25% of reservations are from outside North America. TSLA-5.9% AH. (live blogs: I, II) (Q4: I, II)